Stringbuilder adds backslash after converting it to string.

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Hi I have a situation in which I want to add inverted commas the the string.

C#

static void Main(string[] args)
{
    int valueCounter = 0;
    int valueCount = 0;
    var valueBuilder = new StringBuilder();
    List<string> values = new List<string>();
    values.Add("AAAA");
    values.Add("BBBB");
    values.Add("CCCC");
    valueCount = values.Count;

    foreach (var value in values)
    {
        valueCounter++;
        if ((valueCounter - 1) > 0)
            valueBuilder.Append("\"");
        valueBuilder.Append(values[valueCounter - 1].ToString());

        if (valueCounter != valueCount)
        {
            valueBuilder.Append(@",");
        }
    }

    string output = valueBuilder.ToString();

}

valueBuilder gives result as = {AAAA,"BBBB,"CCCC}
output gives result as = "AAAA,"BBBB,\"CCCC"

I want the output as : "AAAA","BBBB", "CCCC"

Please help.

Posted 13-Sep-15 20:23pm

prat10j

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Philippe Mori 14-Sep-15 12:57pm

It look like your code does not match indicated output.

2 solutions

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Quirkafleeg · Answer 1 · 2015-09-14T00:16:00

Here's a potentially simpler solution:

C#

int valueCounter = 0;
foreach (var value in values)
{
  valueBuilder.Append('"');
  valueBuilder.Append(values[valueCounter].ToString());
  valueBuilder.Append("\",");
  ++valueCounter;
}

// Remove last comma if the StringBuilder has content.
if (valueBuilder.Length > 0)
  --valueBuilder.Length;

Richard MacCutchan · Answer 2 · 2015-09-13T22:26:00

~~The problem occurs because you do not add a closing quote to the field that begins with a double quote. So when StringBuilder converts it to a string it tries to escape the floating quote character.~~

I suspect you are looking at the variables in the debugger, rather than the actual output of your code.

However I suspect your code should be adding quotes after the fields as well as before them like:

C#

if ((valueCounter - 1) > 0)
    valueBuilder.Append("\"");
valueBuilder.Append(values[valueCounter - 1].ToString());
if ((valueCounter - 1) > 0)
    valueBuilder.Append("\"");

Stringbuilder adds backslash after converting it to string.

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